MiniMig v1.1 PCB works with multiple cores. I've had Spectrum, MSX, Amstrad CPC, C64, Vic20 and some Arcade games working on it.
The ARM controller (if I can get one) should make it much easier to run more cores. The biggest limiting factor is the code space of the PIC.
Last edited by alexh; 24 April 2009 at 17:17.